Cypress CY14B101K manual RTC Characteristics, Truth Table For Sram Operations

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CY14B101K

RTC Characteristics

Parameter	Description	Test Conditions		Min	Max	Unit
IBAK [26]	RTC Backup Current		Commercial		300	nA
			Industrial		350	nA

VRTCbat [27]	RTC Battery Pin Voltage			1.8	3.3	V
VRTCcap [28]	RTC Capacitor Pin Voltage			1.2	2.7	V
tOCS	RTC Oscillator Time to Start	At Min Temperature from Power up or Enable			10	sec

		At 25°C Temperature from Power up or Enable			5	sec

Truth Table For SRAM Operations

HSB should remain HIGH for SRAM Operations.

CE	WE	OE	Inputs and Outputs	Mode	Power
H	X	X	High Z	Deselect/Power down	Standby
L	H	L	Data Out (DQ0–DQ7);	Read	Active
L	H	H	High Z	Output Disabled	Active
L	L	X	Data in (DQ0–DQ7);	Write	Active

Notes

26.From either VRTCcap or VRTCbat.

27.Typical = 3.0V during normal operation.

28.Typical = 2.4V during normal operation.

Document Number: 001-06401 Rev. *I

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Contents Functional Description FeaturesLogic Block Diagram Cypress Semiconductor Corporation 198 Champion CourtPower Supply Inputs to the Device Pin ConfigurationsOutput Enable, Active LOW. The active low Pin DefinitionsAutoStore Operation Device OperationHardware Store HSB Operation Software Recall Hardware Recall Power UpSoftware Store Data ProtectionLow Average Active Power Best Practices Current versus Cycle TimeWrite Sram Mode Selection A15 A0 PowerRead Sram StoreReal Time Clock Operation Watchdog Timer AlarmCalibrating the Clock Interrupt Register Power MonitorInterrupts Flags RegisterInterrupt Block Diagram Recommended ValuesRTC Register Map5 BCD Format Data Function/Range WDF OscfDate Time Keeping Hours 0x1FFFB Register Map Detail Time Keeping Years 0x1FFFF 10s YearsTime Keeping Months 0x1FFFE 10s Month Time Keeping Minutes 0x1FFFA0x1FFF7 Alarm Day 0x1FFF5Register Map Detail Calibration/Control Interrupt Status/Control 0x1FFF6To ignore the hours value Alarm Minutes 0x1FFF3 Register Map Detail Alarm Hours 0x1FFF4 10s Alarm HoursWhen the Flags register is read or on power-up Maximum Ratings DC Electrical CharacteristicsRange Ambient Temperature Operating RangeThermal Resistance Data Retention and EnduranceCapacitance AC Test ConditionsAC Switching Characteristics Parameter Sram Read CycleMin Max Parameter Sram Write CycleAutoStore or Power Up Recall Parameter Description CY14B101K Unit Min MaxSoftware Controlled STORE/RECALL Cycles 21 Parameter Alt Description 25 ns 35 ns 45 ns Unit Min MaxSoft Sequence Commands Hardware Store CycleInputs and Outputs Mode Power RTC CharacteristicsTruth Table For Sram Operations Part Numbering Nomenclature CY 14 B 101 K SP 25 X C T NvsramOrdering Information Package Diagrams Pin Shrunk Small Outline PackageDocument History Orig. of Change Submission Description of Change DateUpdated Features 2663934Worldwide Sales and Design Support Products PSoC Solutions Sales, Solutions, and Legal InformationUSB